1. Society of Occupational Medicine. mental health and the workplace - a guide for line managers. (2019). Accessed: January 5, 2021: https://www.som.org.uk/sites/som.org.uk/files/Mental_health_and_the_workplace_2019.pdf.
2. Prevalence of depressive symptoms and related factors in Japanese employees as measured by the Center for Epidemiologic Studies Depression Scale (CES-D);Fushimi M;Community Ment Health J,2013
3. Prevalence of depressive symptoms and related factors in Korean employees: the Third Korean Working Conditions Survey (2011);Park JN;Int J Environ Res Public Health,2016
4. Stress structure of nursery school teachers: results of the stress test based on the industrial safety and health act created by the ministry of health and welfare [Article in Japanese];Kinjo S;Bull Tokyo Kasei Univ Museum,2017
5. Work motivation and mental health of nursery school teachers and relevant factors [Article in Japanese];Lsono F;J Child Heal,2008